<template>
  <div class="login_container">
    <!-- 登录盒子  -->
    <div class="login_box">
      <!-- 头像 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt />
      </div>
      <!-- 登录表单 -->
      <el-form
        label-width="0px"
        class="login_form"
        :rules="loginFormRules"
        ref="LoginFormRef"
        :model="loginForm"
      >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input prefix-icon="iconfont icon-user" v-model="loginForm.username"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            type="password"
            prefix-icon="iconfont icon-3702mima"
            v-model="loginForm.password"
          ></el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="btns">
          <el-button
            type="primary"
            @click="login"
            :loading="loginLoading"
            element-loading-spinner="el-icon-loading"
            element-loading-background="rgba(0, 0, 0, 0.8)"
          >{{loginLoading ? '登录中' : '登录'}}</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      loginForm: {
        username: "admin",
        password: "123456"
      },
      loginFormRules: {
        username: [
          {
            required: true,
            message: "请输入正确格式的用户名称",
            trigger: "blur"
          },
          { min: 3, max: 10, message: "长度为3~10位", trigger: "blur" }
        ],
        password: [
          { required: true, message: "请输入密码", trigger: "blur" },
          {
            min: 4,
            max: 15,
            message: "密码长度为4-15位",
            trigger: "blur"
          }
        ]
      },
      loginLoading: false,
      loginTimer: null
    };
  },
  methods: {
    login() {
      this.loginLoading = true;
      this.$refs.LoginFormRef.validate(async valid => {
        if (!valid) {
          this.loginLoading = false;
          return;
        }
        // 验证成功，发送请求
        this.loginTimer = setTimeout(async () => {
          const { data: res } = await this.$http.post("login", this.loginForm);
          if (res.meta.status !== 200) {
            this.loginLoading = false;
            return this.$message.error("登录失败: " + res.meta.msg);
          }
          this.$message.success("登录成功");
          window.sessionStorage.setItem("token", res.data.token);
          this.$router.push("/home");
        }, 1200);
      });
    },
    resetLoginForm() {
      clearInterval(this.loginTimer);
      this.loginLoading = false;
      this.$refs.LoginFormRef.resetFields();
    }
  }
};
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b5b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  .avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
.btns {
  display: flex;
  justify-content: flex-end;
}
</style>
